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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2007 The Guava Authors<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package com.google.common.collect;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import static com.google.common.base.Preconditions.checkArgument;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import static com.google.common.base.Preconditions.checkNotNull;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import com.google.common.annotations.Beta;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import com.google.common.annotations.GwtCompatible;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import com.google.common.annotations.GwtIncompatible;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import com.google.common.base.Equivalence;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import com.google.common.base.Function;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import com.google.common.base.Joiner.MapJoiner;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import com.google.common.base.Objects;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import com.google.common.base.Preconditions;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import com.google.common.base.Predicate;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import com.google.common.base.Predicates;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import com.google.common.collect.MapDifference.ValueDifference;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import com.google.common.primitives.Ints;<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span>import java.io.Serializable;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import java.util.AbstractCollection;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import java.util.AbstractMap;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import java.util.Collection;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import java.util.Collections;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import java.util.Comparator;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import java.util.EnumMap;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import java.util.Enumeration;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import java.util.HashMap;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import java.util.IdentityHashMap;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import java.util.Iterator;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import java.util.LinkedHashMap;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import java.util.Map;<a name="line.47"></a>
<span class="sourceLineNo">048</span>import java.util.Map.Entry;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import java.util.NavigableMap;<a name="line.49"></a>
<span class="sourceLineNo">050</span>import java.util.NavigableSet;<a name="line.50"></a>
<span class="sourceLineNo">051</span>import java.util.Properties;<a name="line.51"></a>
<span class="sourceLineNo">052</span>import java.util.Set;<a name="line.52"></a>
<span class="sourceLineNo">053</span>import java.util.SortedMap;<a name="line.53"></a>
<span class="sourceLineNo">054</span>import java.util.SortedSet;<a name="line.54"></a>
<span class="sourceLineNo">055</span>import java.util.TreeMap;<a name="line.55"></a>
<span class="sourceLineNo">056</span>import java.util.concurrent.ConcurrentMap;<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>import javax.annotation.Nullable;<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span>/**<a name="line.60"></a>
<span class="sourceLineNo">061</span> * Static utility methods pertaining to {@link Map} instances (including instances of<a name="line.61"></a>
<span class="sourceLineNo">062</span> * {@link SortedMap}, {@link BiMap}, etc.). Also see this class's counterparts<a name="line.62"></a>
<span class="sourceLineNo">063</span> * {@link Lists}, {@link Sets} and {@link Queues}.<a name="line.63"></a>
<span class="sourceLineNo">064</span> *<a name="line.64"></a>
<span class="sourceLineNo">065</span> * &lt;p&gt;See the Guava User Guide article on &lt;a href=<a name="line.65"></a>
<span class="sourceLineNo">066</span> * "http://code.google.com/p/guava-libraries/wiki/CollectionUtilitiesExplained#Maps"&gt;<a name="line.66"></a>
<span class="sourceLineNo">067</span> * {@code Maps}&lt;/a&gt;.<a name="line.67"></a>
<span class="sourceLineNo">068</span> *<a name="line.68"></a>
<span class="sourceLineNo">069</span> * @author Kevin Bourrillion<a name="line.69"></a>
<span class="sourceLineNo">070</span> * @author Mike Bostock<a name="line.70"></a>
<span class="sourceLineNo">071</span> * @author Isaac Shum<a name="line.71"></a>
<span class="sourceLineNo">072</span> * @author Louis Wasserman<a name="line.72"></a>
<span class="sourceLineNo">073</span> * @since 2.0 (imported from Google Collections Library)<a name="line.73"></a>
<span class="sourceLineNo">074</span> */<a name="line.74"></a>
<span class="sourceLineNo">075</span>@GwtCompatible(emulated = true)<a name="line.75"></a>
<span class="sourceLineNo">076</span>public final class Maps {<a name="line.76"></a>
<span class="sourceLineNo">077</span>  private Maps() {}<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>  /**<a name="line.79"></a>
<span class="sourceLineNo">080</span>   * Returns an immutable map instance containing the given entries.<a name="line.80"></a>
<span class="sourceLineNo">081</span>   * Internally, the returned set will be backed by an {@link EnumMap}.<a name="line.81"></a>
<span class="sourceLineNo">082</span>   *<a name="line.82"></a>
<span class="sourceLineNo">083</span>   * &lt;p&gt;The iteration order of the returned map follows the enum's iteration<a name="line.83"></a>
<span class="sourceLineNo">084</span>   * order, not the order in which the elements appear in the given map.<a name="line.84"></a>
<span class="sourceLineNo">085</span>   *<a name="line.85"></a>
<span class="sourceLineNo">086</span>   * @param map the map to make an immutable copy of<a name="line.86"></a>
<span class="sourceLineNo">087</span>   * @return an immutable map containing those entries<a name="line.87"></a>
<span class="sourceLineNo">088</span>   * @since 14.0<a name="line.88"></a>
<span class="sourceLineNo">089</span>   */<a name="line.89"></a>
<span class="sourceLineNo">090</span>  @GwtCompatible(serializable = true)<a name="line.90"></a>
<span class="sourceLineNo">091</span>  @Beta<a name="line.91"></a>
<span class="sourceLineNo">092</span>  public static &lt;K extends Enum&lt;K&gt;, V&gt; ImmutableMap&lt;K, V&gt; immutableEnumMap(<a name="line.92"></a>
<span class="sourceLineNo">093</span>      Map&lt;K, V&gt; map) {<a name="line.93"></a>
<span class="sourceLineNo">094</span>    if (map instanceof ImmutableEnumMap) {<a name="line.94"></a>
<span class="sourceLineNo">095</span>      return (ImmutableEnumMap&lt;K, V&gt;) map;<a name="line.95"></a>
<span class="sourceLineNo">096</span>    } else if (map.isEmpty()) {<a name="line.96"></a>
<span class="sourceLineNo">097</span>      return ImmutableMap.of();<a name="line.97"></a>
<span class="sourceLineNo">098</span>    } else {<a name="line.98"></a>
<span class="sourceLineNo">099</span>      for (Map.Entry&lt;K, V&gt; entry : map.entrySet()) {<a name="line.99"></a>
<span class="sourceLineNo">100</span>        checkNotNull(entry.getKey());<a name="line.100"></a>
<span class="sourceLineNo">101</span>        checkNotNull(entry.getValue());<a name="line.101"></a>
<span class="sourceLineNo">102</span>      }<a name="line.102"></a>
<span class="sourceLineNo">103</span>      return ImmutableEnumMap.asImmutable(new EnumMap&lt;K, V&gt;(map));<a name="line.103"></a>
<span class="sourceLineNo">104</span>    }<a name="line.104"></a>
<span class="sourceLineNo">105</span>  }<a name="line.105"></a>
<span class="sourceLineNo">106</span><a name="line.106"></a>
<span class="sourceLineNo">107</span>  /**<a name="line.107"></a>
<span class="sourceLineNo">108</span>   * Creates a &lt;i&gt;mutable&lt;/i&gt;, empty {@code HashMap} instance.<a name="line.108"></a>
<span class="sourceLineNo">109</span>   *<a name="line.109"></a>
<span class="sourceLineNo">110</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; if mutability is not required, use {@link<a name="line.110"></a>
<span class="sourceLineNo">111</span>   * ImmutableMap#of()} instead.<a name="line.111"></a>
<span class="sourceLineNo">112</span>   *<a name="line.112"></a>
<span class="sourceLineNo">113</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; if {@code K} is an {@code enum} type, use {@link<a name="line.113"></a>
<span class="sourceLineNo">114</span>   * #newEnumMap} instead.<a name="line.114"></a>
<span class="sourceLineNo">115</span>   *<a name="line.115"></a>
<span class="sourceLineNo">116</span>   * @return a new, empty {@code HashMap}<a name="line.116"></a>
<span class="sourceLineNo">117</span>   */<a name="line.117"></a>
<span class="sourceLineNo">118</span>  public static &lt;K, V&gt; HashMap&lt;K, V&gt; newHashMap() {<a name="line.118"></a>
<span class="sourceLineNo">119</span>    return new HashMap&lt;K, V&gt;();<a name="line.119"></a>
<span class="sourceLineNo">120</span>  }<a name="line.120"></a>
<span class="sourceLineNo">121</span><a name="line.121"></a>
<span class="sourceLineNo">122</span>  /**<a name="line.122"></a>
<span class="sourceLineNo">123</span>   * Creates a {@code HashMap} instance, with a high enough "initial capacity"<a name="line.123"></a>
<span class="sourceLineNo">124</span>   * that it &lt;i&gt;should&lt;/i&gt; hold {@code expectedSize} elements without growth.<a name="line.124"></a>
<span class="sourceLineNo">125</span>   * This behavior cannot be broadly guaranteed, but it is observed to be true<a name="line.125"></a>
<span class="sourceLineNo">126</span>   * for OpenJDK 1.6. It also can't be guaranteed that the method isn't<a name="line.126"></a>
<span class="sourceLineNo">127</span>   * inadvertently &lt;i&gt;oversizing&lt;/i&gt; the returned map.<a name="line.127"></a>
<span class="sourceLineNo">128</span>   *<a name="line.128"></a>
<span class="sourceLineNo">129</span>   * @param expectedSize the number of elements you expect to add to the<a name="line.129"></a>
<span class="sourceLineNo">130</span>   *        returned map<a name="line.130"></a>
<span class="sourceLineNo">131</span>   * @return a new, empty {@code HashMap} with enough capacity to hold {@code<a name="line.131"></a>
<span class="sourceLineNo">132</span>   *         expectedSize} elements without resizing<a name="line.132"></a>
<span class="sourceLineNo">133</span>   * @throws IllegalArgumentException if {@code expectedSize} is negative<a name="line.133"></a>
<span class="sourceLineNo">134</span>   */<a name="line.134"></a>
<span class="sourceLineNo">135</span>  public static &lt;K, V&gt; HashMap&lt;K, V&gt; newHashMapWithExpectedSize(<a name="line.135"></a>
<span class="sourceLineNo">136</span>      int expectedSize) {<a name="line.136"></a>
<span class="sourceLineNo">137</span>    return new HashMap&lt;K, V&gt;(capacity(expectedSize));<a name="line.137"></a>
<span class="sourceLineNo">138</span>  }<a name="line.138"></a>
<span class="sourceLineNo">139</span><a name="line.139"></a>
<span class="sourceLineNo">140</span>  /**<a name="line.140"></a>
<span class="sourceLineNo">141</span>   * Returns a capacity that is sufficient to keep the map from being resized as<a name="line.141"></a>
<span class="sourceLineNo">142</span>   * long as it grows no larger than expectedSize and the load factor is &gt;= its<a name="line.142"></a>
<span class="sourceLineNo">143</span>   * default (0.75).<a name="line.143"></a>
<span class="sourceLineNo">144</span>   */<a name="line.144"></a>
<span class="sourceLineNo">145</span>  static int capacity(int expectedSize) {<a name="line.145"></a>
<span class="sourceLineNo">146</span>    if (expectedSize &lt; 3) {<a name="line.146"></a>
<span class="sourceLineNo">147</span>      checkArgument(expectedSize &gt;= 0);<a name="line.147"></a>
<span class="sourceLineNo">148</span>      return expectedSize + 1;<a name="line.148"></a>
<span class="sourceLineNo">149</span>    }<a name="line.149"></a>
<span class="sourceLineNo">150</span>    if (expectedSize &lt; Ints.MAX_POWER_OF_TWO) {<a name="line.150"></a>
<span class="sourceLineNo">151</span>      return expectedSize + expectedSize / 3;<a name="line.151"></a>
<span class="sourceLineNo">152</span>    }<a name="line.152"></a>
<span class="sourceLineNo">153</span>    return Integer.MAX_VALUE; // any large value<a name="line.153"></a>
<span class="sourceLineNo">154</span>  }<a name="line.154"></a>
<span class="sourceLineNo">155</span><a name="line.155"></a>
<span class="sourceLineNo">156</span>  /**<a name="line.156"></a>
<span class="sourceLineNo">157</span>   * Creates a &lt;i&gt;mutable&lt;/i&gt; {@code HashMap} instance with the same mappings as<a name="line.157"></a>
<span class="sourceLineNo">158</span>   * the specified map.<a name="line.158"></a>
<span class="sourceLineNo">159</span>   *<a name="line.159"></a>
<span class="sourceLineNo">160</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; if mutability is not required, use {@link<a name="line.160"></a>
<span class="sourceLineNo">161</span>   * ImmutableMap#copyOf(Map)} instead.<a name="line.161"></a>
<span class="sourceLineNo">162</span>   *<a name="line.162"></a>
<span class="sourceLineNo">163</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; if {@code K} is an {@link Enum} type, use {@link<a name="line.163"></a>
<span class="sourceLineNo">164</span>   * #newEnumMap} instead.<a name="line.164"></a>
<span class="sourceLineNo">165</span>   *<a name="line.165"></a>
<span class="sourceLineNo">166</span>   * @param map the mappings to be placed in the new map<a name="line.166"></a>
<span class="sourceLineNo">167</span>   * @return a new {@code HashMap} initialized with the mappings from {@code<a name="line.167"></a>
<span class="sourceLineNo">168</span>   *         map}<a name="line.168"></a>
<span class="sourceLineNo">169</span>   */<a name="line.169"></a>
<span class="sourceLineNo">170</span>  public static &lt;K, V&gt; HashMap&lt;K, V&gt; newHashMap(<a name="line.170"></a>
<span class="sourceLineNo">171</span>      Map&lt;? extends K, ? extends V&gt; map) {<a name="line.171"></a>
<span class="sourceLineNo">172</span>    return new HashMap&lt;K, V&gt;(map);<a name="line.172"></a>
<span class="sourceLineNo">173</span>  }<a name="line.173"></a>
<span class="sourceLineNo">174</span><a name="line.174"></a>
<span class="sourceLineNo">175</span>  /**<a name="line.175"></a>
<span class="sourceLineNo">176</span>   * Creates a &lt;i&gt;mutable&lt;/i&gt;, empty, insertion-ordered {@code LinkedHashMap}<a name="line.176"></a>
<span class="sourceLineNo">177</span>   * instance.<a name="line.177"></a>
<span class="sourceLineNo">178</span>   *<a name="line.178"></a>
<span class="sourceLineNo">179</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; if mutability is not required, use {@link<a name="line.179"></a>
<span class="sourceLineNo">180</span>   * ImmutableMap#of()} instead.<a name="line.180"></a>
<span class="sourceLineNo">181</span>   *<a name="line.181"></a>
<span class="sourceLineNo">182</span>   * @return a new, empty {@code LinkedHashMap}<a name="line.182"></a>
<span class="sourceLineNo">183</span>   */<a name="line.183"></a>
<span class="sourceLineNo">184</span>  public static &lt;K, V&gt; LinkedHashMap&lt;K, V&gt; newLinkedHashMap() {<a name="line.184"></a>
<span class="sourceLineNo">185</span>    return new LinkedHashMap&lt;K, V&gt;();<a name="line.185"></a>
<span class="sourceLineNo">186</span>  }<a name="line.186"></a>
<span class="sourceLineNo">187</span><a name="line.187"></a>
<span class="sourceLineNo">188</span>  /**<a name="line.188"></a>
<span class="sourceLineNo">189</span>   * Creates a &lt;i&gt;mutable&lt;/i&gt;, insertion-ordered {@code LinkedHashMap} instance<a name="line.189"></a>
<span class="sourceLineNo">190</span>   * with the same mappings as the specified map.<a name="line.190"></a>
<span class="sourceLineNo">191</span>   *<a name="line.191"></a>
<span class="sourceLineNo">192</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; if mutability is not required, use {@link<a name="line.192"></a>
<span class="sourceLineNo">193</span>   * ImmutableMap#copyOf(Map)} instead.<a name="line.193"></a>
<span class="sourceLineNo">194</span>   *<a name="line.194"></a>
<span class="sourceLineNo">195</span>   * @param map the mappings to be placed in the new map<a name="line.195"></a>
<span class="sourceLineNo">196</span>   * @return a new, {@code LinkedHashMap} initialized with the mappings from<a name="line.196"></a>
<span class="sourceLineNo">197</span>   *         {@code map}<a name="line.197"></a>
<span class="sourceLineNo">198</span>   */<a name="line.198"></a>
<span class="sourceLineNo">199</span>  public static &lt;K, V&gt; LinkedHashMap&lt;K, V&gt; newLinkedHashMap(<a name="line.199"></a>
<span class="sourceLineNo">200</span>      Map&lt;? extends K, ? extends V&gt; map) {<a name="line.200"></a>
<span class="sourceLineNo">201</span>    return new LinkedHashMap&lt;K, V&gt;(map);<a name="line.201"></a>
<span class="sourceLineNo">202</span>  }<a name="line.202"></a>
<span class="sourceLineNo">203</span><a name="line.203"></a>
<span class="sourceLineNo">204</span>  /**<a name="line.204"></a>
<span class="sourceLineNo">205</span>   * Returns a general-purpose instance of {@code ConcurrentMap}, which supports<a name="line.205"></a>
<span class="sourceLineNo">206</span>   * all optional operations of the ConcurrentMap interface. It does not permit<a name="line.206"></a>
<span class="sourceLineNo">207</span>   * null keys or values. It is serializable.<a name="line.207"></a>
<span class="sourceLineNo">208</span>   *<a name="line.208"></a>
<span class="sourceLineNo">209</span>   * &lt;p&gt;This is currently accomplished by calling {@link MapMaker#makeMap()}.<a name="line.209"></a>
<span class="sourceLineNo">210</span>   *<a name="line.210"></a>
<span class="sourceLineNo">211</span>   * &lt;p&gt;It is preferable to use {@code MapMaker} directly (rather than through<a name="line.211"></a>
<span class="sourceLineNo">212</span>   * this method), as it presents numerous useful configuration options,<a name="line.212"></a>
<span class="sourceLineNo">213</span>   * such as the concurrency level, load factor, key/value reference types,<a name="line.213"></a>
<span class="sourceLineNo">214</span>   * and value computation.<a name="line.214"></a>
<span class="sourceLineNo">215</span>   *<a name="line.215"></a>
<span class="sourceLineNo">216</span>   * @return a new, empty {@code ConcurrentMap}<a name="line.216"></a>
<span class="sourceLineNo">217</span>   * @since 3.0<a name="line.217"></a>
<span class="sourceLineNo">218</span>   */<a name="line.218"></a>
<span class="sourceLineNo">219</span>  public static &lt;K, V&gt; ConcurrentMap&lt;K, V&gt; newConcurrentMap() {<a name="line.219"></a>
<span class="sourceLineNo">220</span>    return new MapMaker().&lt;K, V&gt;makeMap();<a name="line.220"></a>
<span class="sourceLineNo">221</span>  }<a name="line.221"></a>
<span class="sourceLineNo">222</span><a name="line.222"></a>
<span class="sourceLineNo">223</span>  /**<a name="line.223"></a>
<span class="sourceLineNo">224</span>   * Creates a &lt;i&gt;mutable&lt;/i&gt;, empty {@code TreeMap} instance using the natural<a name="line.224"></a>
<span class="sourceLineNo">225</span>   * ordering of its elements.<a name="line.225"></a>
<span class="sourceLineNo">226</span>   *<a name="line.226"></a>
<span class="sourceLineNo">227</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; if mutability is not required, use {@link<a name="line.227"></a>
<span class="sourceLineNo">228</span>   * ImmutableSortedMap#of()} instead.<a name="line.228"></a>
<span class="sourceLineNo">229</span>   *<a name="line.229"></a>
<span class="sourceLineNo">230</span>   * @return a new, empty {@code TreeMap}<a name="line.230"></a>
<span class="sourceLineNo">231</span>   */<a name="line.231"></a>
<span class="sourceLineNo">232</span>  public static &lt;K extends Comparable, V&gt; TreeMap&lt;K, V&gt; newTreeMap() {<a name="line.232"></a>
<span class="sourceLineNo">233</span>    return new TreeMap&lt;K, V&gt;();<a name="line.233"></a>
<span class="sourceLineNo">234</span>  }<a name="line.234"></a>
<span class="sourceLineNo">235</span><a name="line.235"></a>
<span class="sourceLineNo">236</span>  /**<a name="line.236"></a>
<span class="sourceLineNo">237</span>   * Creates a &lt;i&gt;mutable&lt;/i&gt; {@code TreeMap} instance with the same mappings as<a name="line.237"></a>
<span class="sourceLineNo">238</span>   * the specified map and using the same ordering as the specified map.<a name="line.238"></a>
<span class="sourceLineNo">239</span>   *<a name="line.239"></a>
<span class="sourceLineNo">240</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; if mutability is not required, use {@link<a name="line.240"></a>
<span class="sourceLineNo">241</span>   * ImmutableSortedMap#copyOfSorted(SortedMap)} instead.<a name="line.241"></a>
<span class="sourceLineNo">242</span>   *<a name="line.242"></a>
<span class="sourceLineNo">243</span>   * @param map the sorted map whose mappings are to be placed in the new map<a name="line.243"></a>
<span class="sourceLineNo">244</span>   *        and whose comparator is to be used to sort the new map<a name="line.244"></a>
<span class="sourceLineNo">245</span>   * @return a new {@code TreeMap} initialized with the mappings from {@code<a name="line.245"></a>
<span class="sourceLineNo">246</span>   *         map} and using the comparator of {@code map}<a name="line.246"></a>
<span class="sourceLineNo">247</span>   */<a name="line.247"></a>
<span class="sourceLineNo">248</span>  public static &lt;K, V&gt; TreeMap&lt;K, V&gt; newTreeMap(SortedMap&lt;K, ? extends V&gt; map) {<a name="line.248"></a>
<span class="sourceLineNo">249</span>    return new TreeMap&lt;K, V&gt;(map);<a name="line.249"></a>
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<span class="sourceLineNo">251</span><a name="line.251"></a>
<span class="sourceLineNo">252</span>  /**<a name="line.252"></a>
<span class="sourceLineNo">253</span>   * Creates a &lt;i&gt;mutable&lt;/i&gt;, empty {@code TreeMap} instance using the given<a name="line.253"></a>
<span class="sourceLineNo">254</span>   * comparator.<a name="line.254"></a>
<span class="sourceLineNo">255</span>   *<a name="line.255"></a>
<span class="sourceLineNo">256</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; if mutability is not required, use {@code<a name="line.256"></a>
<span class="sourceLineNo">257</span>   * ImmutableSortedMap.orderedBy(comparator).build()} instead.<a name="line.257"></a>
<span class="sourceLineNo">258</span>   *<a name="line.258"></a>
<span class="sourceLineNo">259</span>   * @param comparator the comparator to sort the keys with<a name="line.259"></a>
<span class="sourceLineNo">260</span>   * @return a new, empty {@code TreeMap}<a name="line.260"></a>
<span class="sourceLineNo">261</span>   */<a name="line.261"></a>
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<span class="sourceLineNo">263</span>      @Nullable Comparator&lt;C&gt; comparator) {<a name="line.263"></a>
<span class="sourceLineNo">264</span>    // Ideally, the extra type parameter "C" shouldn't be necessary. It is a<a name="line.264"></a>
<span class="sourceLineNo">265</span>    // work-around of a compiler type inference quirk that prevents the<a name="line.265"></a>
<span class="sourceLineNo">266</span>    // following code from being compiled:<a name="line.266"></a>
<span class="sourceLineNo">267</span>    // Comparator&lt;Class&lt;?&gt;&gt; comparator = null;<a name="line.267"></a>
<span class="sourceLineNo">268</span>    // Map&lt;Class&lt;? extends Throwable&gt;, String&gt; map = newTreeMap(comparator);<a name="line.268"></a>
<span class="sourceLineNo">269</span>    return new TreeMap&lt;K, V&gt;(comparator);<a name="line.269"></a>
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<span class="sourceLineNo">271</span><a name="line.271"></a>
<span class="sourceLineNo">272</span>  /**<a name="line.272"></a>
<span class="sourceLineNo">273</span>   * Creates an {@code EnumMap} instance.<a name="line.273"></a>
<span class="sourceLineNo">274</span>   *<a name="line.274"></a>
<span class="sourceLineNo">275</span>   * @param type the key type for this map<a name="line.275"></a>
<span class="sourceLineNo">276</span>   * @return a new, empty {@code EnumMap}<a name="line.276"></a>
<span class="sourceLineNo">277</span>   */<a name="line.277"></a>
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<span class="sourceLineNo">281</span><a name="line.281"></a>
<span class="sourceLineNo">282</span>  /**<a name="line.282"></a>
<span class="sourceLineNo">283</span>   * Creates an {@code EnumMap} with the same mappings as the specified map.<a name="line.283"></a>
<span class="sourceLineNo">284</span>   *<a name="line.284"></a>
<span class="sourceLineNo">285</span>   * @param map the map from which to initialize this {@code EnumMap}<a name="line.285"></a>
<span class="sourceLineNo">286</span>   * @return a new {@code EnumMap} initialized with the mappings from {@code<a name="line.286"></a>
<span class="sourceLineNo">287</span>   *         map}<a name="line.287"></a>
<span class="sourceLineNo">288</span>   * @throws IllegalArgumentException if {@code m} is not an {@code EnumMap}<a name="line.288"></a>
<span class="sourceLineNo">289</span>   *         instance and contains no mappings<a name="line.289"></a>
<span class="sourceLineNo">290</span>   */<a name="line.290"></a>
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<span class="sourceLineNo">292</span>      Map&lt;K, ? extends V&gt; map) {<a name="line.292"></a>
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<span class="sourceLineNo">295</span><a name="line.295"></a>
<span class="sourceLineNo">296</span>  /**<a name="line.296"></a>
<span class="sourceLineNo">297</span>   * Creates an {@code IdentityHashMap} instance.<a name="line.297"></a>
<span class="sourceLineNo">298</span>   *<a name="line.298"></a>
<span class="sourceLineNo">299</span>   * @return a new, empty {@code IdentityHashMap}<a name="line.299"></a>
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<span class="sourceLineNo">304</span><a name="line.304"></a>
<span class="sourceLineNo">305</span>  /**<a name="line.305"></a>
<span class="sourceLineNo">306</span>   * Computes the difference between two maps. This difference is an immutable<a name="line.306"></a>
<span class="sourceLineNo">307</span>   * snapshot of the state of the maps at the time this method is called. It<a name="line.307"></a>
<span class="sourceLineNo">308</span>   * will never change, even if the maps change at a later time.<a name="line.308"></a>
<span class="sourceLineNo">309</span>   *<a name="line.309"></a>
<span class="sourceLineNo">310</span>   * &lt;p&gt;Since this method uses {@code HashMap} instances internally, the keys of<a name="line.310"></a>
<span class="sourceLineNo">311</span>   * the supplied maps must be well-behaved with respect to<a name="line.311"></a>
<span class="sourceLineNo">312</span>   * {@link Object#equals} and {@link Object#hashCode}.<a name="line.312"></a>
<span class="sourceLineNo">313</span>   *<a name="line.313"></a>
<span class="sourceLineNo">314</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt;If you only need to know whether two maps have the same<a name="line.314"></a>
<span class="sourceLineNo">315</span>   * mappings, call {@code left.equals(right)} instead of this method.<a name="line.315"></a>
<span class="sourceLineNo">316</span>   *<a name="line.316"></a>
<span class="sourceLineNo">317</span>   * @param left the map to treat as the "left" map for purposes of comparison<a name="line.317"></a>
<span class="sourceLineNo">318</span>   * @param right the map to treat as the "right" map for purposes of comparison<a name="line.318"></a>
<span class="sourceLineNo">319</span>   * @return the difference between the two maps<a name="line.319"></a>
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<span class="sourceLineNo">321</span>  @SuppressWarnings("unchecked")<a name="line.321"></a>
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<span class="sourceLineNo">323</span>      Map&lt;? extends K, ? extends V&gt; left, Map&lt;? extends K, ? extends V&gt; right) {<a name="line.323"></a>
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<span class="sourceLineNo">325</span>      SortedMap&lt;K, ? extends V&gt; sortedLeft = (SortedMap&lt;K, ? extends V&gt;) left;<a name="line.325"></a>
<span class="sourceLineNo">326</span>      SortedMapDifference&lt;K, V&gt; result = difference(sortedLeft, right);<a name="line.326"></a>
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<span class="sourceLineNo">331</span><a name="line.331"></a>
<span class="sourceLineNo">332</span>  /**<a name="line.332"></a>
<span class="sourceLineNo">333</span>   * Computes the difference between two maps. This difference is an immutable<a name="line.333"></a>
<span class="sourceLineNo">334</span>   * snapshot of the state of the maps at the time this method is called. It<a name="line.334"></a>
<span class="sourceLineNo">335</span>   * will never change, even if the maps change at a later time.<a name="line.335"></a>
<span class="sourceLineNo">336</span>   *<a name="line.336"></a>
<span class="sourceLineNo">337</span>   * &lt;p&gt;Values are compared using a provided equivalence, in the case of<a name="line.337"></a>
<span class="sourceLineNo">338</span>   * equality, the value on the 'left' is returned in the difference.<a name="line.338"></a>
<span class="sourceLineNo">339</span>   *<a name="line.339"></a>
<span class="sourceLineNo">340</span>   * &lt;p&gt;Since this method uses {@code HashMap} instances internally, the keys of<a name="line.340"></a>
<span class="sourceLineNo">341</span>   * the supplied maps must be well-behaved with respect to<a name="line.341"></a>
<span class="sourceLineNo">342</span>   * {@link Object#equals} and {@link Object#hashCode}.<a name="line.342"></a>
<span class="sourceLineNo">343</span>   *<a name="line.343"></a>
<span class="sourceLineNo">344</span>   * @param left the map to treat as the "left" map for purposes of comparison<a name="line.344"></a>
<span class="sourceLineNo">345</span>   * @param right the map to treat as the "right" map for purposes of comparison<a name="line.345"></a>
<span class="sourceLineNo">346</span>   * @param valueEquivalence the equivalence relationship to use to compare<a name="line.346"></a>
<span class="sourceLineNo">347</span>   *    values<a name="line.347"></a>
<span class="sourceLineNo">348</span>   * @return the difference between the two maps<a name="line.348"></a>
<span class="sourceLineNo">349</span>   * @since 10.0<a name="line.349"></a>
<span class="sourceLineNo">350</span>   */<a name="line.350"></a>
<span class="sourceLineNo">351</span>  @Beta<a name="line.351"></a>
<span class="sourceLineNo">352</span>  public static &lt;K, V&gt; MapDifference&lt;K, V&gt; difference(<a name="line.352"></a>
<span class="sourceLineNo">353</span>      Map&lt;? extends K, ? extends V&gt; left, Map&lt;? extends K, ? extends V&gt; right,<a name="line.353"></a>
<span class="sourceLineNo">354</span>      Equivalence&lt;? super V&gt; valueEquivalence) {<a name="line.354"></a>
<span class="sourceLineNo">355</span>    Preconditions.checkNotNull(valueEquivalence);<a name="line.355"></a>
<span class="sourceLineNo">356</span><a name="line.356"></a>
<span class="sourceLineNo">357</span>    Map&lt;K, V&gt; onlyOnLeft = newHashMap();<a name="line.357"></a>
<span class="sourceLineNo">358</span>    Map&lt;K, V&gt; onlyOnRight = new HashMap&lt;K, V&gt;(right); // will whittle it down<a name="line.358"></a>
<span class="sourceLineNo">359</span>    Map&lt;K, V&gt; onBoth = newHashMap();<a name="line.359"></a>
<span class="sourceLineNo">360</span>    Map&lt;K, MapDifference.ValueDifference&lt;V&gt;&gt; differences = newHashMap();<a name="line.360"></a>
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<span class="sourceLineNo">362</span><a name="line.362"></a>
<span class="sourceLineNo">363</span>    for (Entry&lt;? extends K, ? extends V&gt; entry : left.entrySet()) {<a name="line.363"></a>
<span class="sourceLineNo">364</span>      K leftKey = entry.getKey();<a name="line.364"></a>
<span class="sourceLineNo">365</span>      V leftValue = entry.getValue();<a name="line.365"></a>
<span class="sourceLineNo">366</span>      if (right.containsKey(leftKey)) {<a name="line.366"></a>
<span class="sourceLineNo">367</span>        V rightValue = onlyOnRight.remove(leftKey);<a name="line.367"></a>
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<span class="sourceLineNo">380</span><a name="line.380"></a>
<span class="sourceLineNo">381</span>    boolean areEqual = eq &amp;&amp; onlyOnRight.isEmpty();<a name="line.381"></a>
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<span class="sourceLineNo">385</span><a name="line.385"></a>
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<span class="sourceLineNo">387</span>      Map&lt;K, V&gt; onlyOnLeft, Map&lt;K, V&gt; onlyOnRight, Map&lt;K, V&gt; onBoth,<a name="line.387"></a>
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<span class="sourceLineNo">389</span>    return new MapDifferenceImpl&lt;K, V&gt;(areEqual,<a name="line.389"></a>
<span class="sourceLineNo">390</span>        Collections.unmodifiableMap(onlyOnLeft),<a name="line.390"></a>
<span class="sourceLineNo">391</span>        Collections.unmodifiableMap(onlyOnRight),<a name="line.391"></a>
<span class="sourceLineNo">392</span>        Collections.unmodifiableMap(onBoth),<a name="line.392"></a>
<span class="sourceLineNo">393</span>        Collections.unmodifiableMap(differences));<a name="line.393"></a>
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<span class="sourceLineNo">395</span><a name="line.395"></a>
<span class="sourceLineNo">396</span>  static class MapDifferenceImpl&lt;K, V&gt; implements MapDifference&lt;K, V&gt; {<a name="line.396"></a>
<span class="sourceLineNo">397</span>    final boolean areEqual;<a name="line.397"></a>
<span class="sourceLineNo">398</span>    final Map&lt;K, V&gt; onlyOnLeft;<a name="line.398"></a>
<span class="sourceLineNo">399</span>    final Map&lt;K, V&gt; onlyOnRight;<a name="line.399"></a>
<span class="sourceLineNo">400</span>    final Map&lt;K, V&gt; onBoth;<a name="line.400"></a>
<span class="sourceLineNo">401</span>    final Map&lt;K, ValueDifference&lt;V&gt;&gt; differences;<a name="line.401"></a>
<span class="sourceLineNo">402</span><a name="line.402"></a>
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<span class="sourceLineNo">412</span><a name="line.412"></a>
<span class="sourceLineNo">413</span>    @Override<a name="line.413"></a>
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<span class="sourceLineNo">423</span>    @Override<a name="line.423"></a>
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<span class="sourceLineNo">428</span>    @Override<a name="line.428"></a>
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<span class="sourceLineNo">432</span><a name="line.432"></a>
<span class="sourceLineNo">433</span>    @Override<a name="line.433"></a>
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<span class="sourceLineNo">475</span><a name="line.475"></a>
<span class="sourceLineNo">476</span>  static class ValueDifferenceImpl&lt;V&gt;<a name="line.476"></a>
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<span class="sourceLineNo">478</span>    private final V left;<a name="line.478"></a>
<span class="sourceLineNo">479</span>    private final V right;<a name="line.479"></a>
<span class="sourceLineNo">480</span><a name="line.480"></a>
<span class="sourceLineNo">481</span>    static &lt;V&gt; ValueDifference&lt;V&gt; create(@Nullable V left, @Nullable V right) {<a name="line.481"></a>
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<span class="sourceLineNo">484</span><a name="line.484"></a>
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<span class="sourceLineNo">487</span>      this.right = right;<a name="line.487"></a>
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<span class="sourceLineNo">489</span><a name="line.489"></a>
<span class="sourceLineNo">490</span>    @Override<a name="line.490"></a>
<span class="sourceLineNo">491</span>    public V leftValue() {<a name="line.491"></a>
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<span class="sourceLineNo">494</span><a name="line.494"></a>
<span class="sourceLineNo">495</span>    @Override<a name="line.495"></a>
<span class="sourceLineNo">496</span>    public V rightValue() {<a name="line.496"></a>
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<span class="sourceLineNo">499</span><a name="line.499"></a>
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<span class="sourceLineNo">503</span>            (MapDifference.ValueDifference&lt;?&gt;) object;<a name="line.503"></a>
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<span class="sourceLineNo">513</span><a name="line.513"></a>
<span class="sourceLineNo">514</span>    @Override public String toString() {<a name="line.514"></a>
<span class="sourceLineNo">515</span>      return "(" + left + ", " + right + ")";<a name="line.515"></a>
<span class="sourceLineNo">516</span>    }<a name="line.516"></a>
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<span class="sourceLineNo">518</span><a name="line.518"></a>
<span class="sourceLineNo">519</span>  /**<a name="line.519"></a>
<span class="sourceLineNo">520</span>   * Computes the difference between two sorted maps, using the comparator of<a name="line.520"></a>
<span class="sourceLineNo">521</span>   * the left map, or {@code Ordering.natural()} if the left map uses the<a name="line.521"></a>
<span class="sourceLineNo">522</span>   * natural ordering of its elements. This difference is an immutable snapshot<a name="line.522"></a>
<span class="sourceLineNo">523</span>   * of the state of the maps at the time this method is called. It will never<a name="line.523"></a>
<span class="sourceLineNo">524</span>   * change, even if the maps change at a later time.<a name="line.524"></a>
<span class="sourceLineNo">525</span>   *<a name="line.525"></a>
<span class="sourceLineNo">526</span>   * &lt;p&gt;Since this method uses {@code TreeMap} instances internally, the keys of<a name="line.526"></a>
<span class="sourceLineNo">527</span>   * the right map must all compare as distinct according to the comparator<a name="line.527"></a>
<span class="sourceLineNo">528</span>   * of the left map.<a name="line.528"></a>
<span class="sourceLineNo">529</span>   *<a name="line.529"></a>
<span class="sourceLineNo">530</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt;If you only need to know whether two sorted maps have the<a name="line.530"></a>
<span class="sourceLineNo">531</span>   * same mappings, call {@code left.equals(right)} instead of this method.<a name="line.531"></a>
<span class="sourceLineNo">532</span>   *<a name="line.532"></a>
<span class="sourceLineNo">533</span>   * @param left the map to treat as the "left" map for purposes of comparison<a name="line.533"></a>
<span class="sourceLineNo">534</span>   * @param right the map to treat as the "right" map for purposes of comparison<a name="line.534"></a>
<span class="sourceLineNo">535</span>   * @return the difference between the two maps<a name="line.535"></a>
<span class="sourceLineNo">536</span>   * @since 11.0<a name="line.536"></a>
<span class="sourceLineNo">537</span>   */<a name="line.537"></a>
<span class="sourceLineNo">538</span>  public static &lt;K, V&gt; SortedMapDifference&lt;K, V&gt; difference(<a name="line.538"></a>
<span class="sourceLineNo">539</span>      SortedMap&lt;K, ? extends V&gt; left, Map&lt;? extends K, ? extends V&gt; right) {<a name="line.539"></a>
<span class="sourceLineNo">540</span>    checkNotNull(left);<a name="line.540"></a>
<span class="sourceLineNo">541</span>    checkNotNull(right);<a name="line.541"></a>
<span class="sourceLineNo">542</span>    Comparator&lt;? super K&gt; comparator = orNaturalOrder(left.comparator());<a name="line.542"></a>
<span class="sourceLineNo">543</span>    SortedMap&lt;K, V&gt; onlyOnLeft = Maps.newTreeMap(comparator);<a name="line.543"></a>
<span class="sourceLineNo">544</span>    SortedMap&lt;K, V&gt; onlyOnRight = Maps.newTreeMap(comparator);<a name="line.544"></a>
<span class="sourceLineNo">545</span>    onlyOnRight.putAll(right); // will whittle it down<a name="line.545"></a>
<span class="sourceLineNo">546</span>    SortedMap&lt;K, V&gt; onBoth = Maps.newTreeMap(comparator);<a name="line.546"></a>
<span class="sourceLineNo">547</span>    SortedMap&lt;K, MapDifference.ValueDifference&lt;V&gt;&gt; differences =<a name="line.547"></a>
<span class="sourceLineNo">548</span>        Maps.newTreeMap(comparator);<a name="line.548"></a>
<span class="sourceLineNo">549</span>    boolean eq = true;<a name="line.549"></a>
<span class="sourceLineNo">550</span><a name="line.550"></a>
<span class="sourceLineNo">551</span>    for (Entry&lt;? extends K, ? extends V&gt; entry : left.entrySet()) {<a name="line.551"></a>
<span class="sourceLineNo">552</span>      K leftKey = entry.getKey();<a name="line.552"></a>
<span class="sourceLineNo">553</span>      V leftValue = entry.getValue();<a name="line.553"></a>
<span class="sourceLineNo">554</span>      if (right.containsKey(leftKey)) {<a name="line.554"></a>
<span class="sourceLineNo">555</span>        V rightValue = onlyOnRight.remove(leftKey);<a name="line.555"></a>
<span class="sourceLineNo">556</span>        if (Objects.equal(leftValue, rightValue)) {<a name="line.556"></a>
<span class="sourceLineNo">557</span>          onBoth.put(leftKey, leftValue);<a name="line.557"></a>
<span class="sourceLineNo">558</span>        } else {<a name="line.558"></a>
<span class="sourceLineNo">559</span>          eq = false;<a name="line.559"></a>
<span class="sourceLineNo">560</span>          differences.put(<a name="line.560"></a>
<span class="sourceLineNo">561</span>              leftKey, ValueDifferenceImpl.create(leftValue, rightValue));<a name="line.561"></a>
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<span class="sourceLineNo">563</span>      } else {<a name="line.563"></a>
<span class="sourceLineNo">564</span>        eq = false;<a name="line.564"></a>
<span class="sourceLineNo">565</span>        onlyOnLeft.put(leftKey, leftValue);<a name="line.565"></a>
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<span class="sourceLineNo">568</span><a name="line.568"></a>
<span class="sourceLineNo">569</span>    boolean areEqual = eq &amp;&amp; onlyOnRight.isEmpty();<a name="line.569"></a>
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<span class="sourceLineNo">573</span><a name="line.573"></a>
<span class="sourceLineNo">574</span>  private static &lt;K, V&gt; SortedMapDifference&lt;K, V&gt; sortedMapDifference(<a name="line.574"></a>
<span class="sourceLineNo">575</span>      boolean areEqual, SortedMap&lt;K, V&gt; onlyOnLeft, SortedMap&lt;K, V&gt; onlyOnRight,<a name="line.575"></a>
<span class="sourceLineNo">576</span>      SortedMap&lt;K, V&gt; onBoth, SortedMap&lt;K, ValueDifference&lt;V&gt;&gt; differences) {<a name="line.576"></a>
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<span class="sourceLineNo">578</span>        Collections.unmodifiableSortedMap(onlyOnLeft),<a name="line.578"></a>
<span class="sourceLineNo">579</span>        Collections.unmodifiableSortedMap(onlyOnRight),<a name="line.579"></a>
<span class="sourceLineNo">580</span>        Collections.unmodifiableSortedMap(onBoth),<a name="line.580"></a>
<span class="sourceLineNo">581</span>        Collections.unmodifiableSortedMap(differences));<a name="line.581"></a>
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<span class="sourceLineNo">583</span><a name="line.583"></a>
<span class="sourceLineNo">584</span>  static class SortedMapDifferenceImpl&lt;K, V&gt; extends MapDifferenceImpl&lt;K, V&gt;<a name="line.584"></a>
<span class="sourceLineNo">585</span>      implements SortedMapDifference&lt;K, V&gt; {<a name="line.585"></a>
<span class="sourceLineNo">586</span>    SortedMapDifferenceImpl(boolean areEqual, SortedMap&lt;K, V&gt; onlyOnLeft,<a name="line.586"></a>
<span class="sourceLineNo">587</span>        SortedMap&lt;K, V&gt; onlyOnRight, SortedMap&lt;K, V&gt; onBoth,<a name="line.587"></a>
<span class="sourceLineNo">588</span>        SortedMap&lt;K, ValueDifference&lt;V&gt;&gt; differences) {<a name="line.588"></a>
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<span class="sourceLineNo">591</span><a name="line.591"></a>
<span class="sourceLineNo">592</span>    @Override public SortedMap&lt;K, ValueDifference&lt;V&gt;&gt; entriesDiffering() {<a name="line.592"></a>
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<span class="sourceLineNo">595</span><a name="line.595"></a>
<span class="sourceLineNo">596</span>    @Override public SortedMap&lt;K, V&gt; entriesInCommon() {<a name="line.596"></a>
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<span class="sourceLineNo">599</span><a name="line.599"></a>
<span class="sourceLineNo">600</span>    @Override public SortedMap&lt;K, V&gt; entriesOnlyOnLeft() {<a name="line.600"></a>
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<span class="sourceLineNo">603</span><a name="line.603"></a>
<span class="sourceLineNo">604</span>    @Override public SortedMap&lt;K, V&gt; entriesOnlyOnRight() {<a name="line.604"></a>
<span class="sourceLineNo">605</span>      return (SortedMap&lt;K, V&gt;) super.entriesOnlyOnRight();<a name="line.605"></a>
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<span class="sourceLineNo">608</span><a name="line.608"></a>
<span class="sourceLineNo">609</span>  /**<a name="line.609"></a>
<span class="sourceLineNo">610</span>   * Returns the specified comparator if not null; otherwise returns {@code<a name="line.610"></a>
<span class="sourceLineNo">611</span>   * Ordering.natural()}. This method is an abomination of generics; the only<a name="line.611"></a>
<span class="sourceLineNo">612</span>   * purpose of this method is to contain the ugly type-casting in one place.<a name="line.612"></a>
<span class="sourceLineNo">613</span>   */<a name="line.613"></a>
<span class="sourceLineNo">614</span>  @SuppressWarnings("unchecked")<a name="line.614"></a>
<span class="sourceLineNo">615</span>  static &lt;E&gt; Comparator&lt;? super E&gt; orNaturalOrder(<a name="line.615"></a>
<span class="sourceLineNo">616</span>      @Nullable Comparator&lt;? super E&gt; comparator) {<a name="line.616"></a>
<span class="sourceLineNo">617</span>    if (comparator != null) { // can't use ? : because of javac bug 5080917<a name="line.617"></a>
<span class="sourceLineNo">618</span>      return comparator;<a name="line.618"></a>
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<span class="sourceLineNo">620</span>    return (Comparator&lt;E&gt;) Ordering.natural();<a name="line.620"></a>
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<span class="sourceLineNo">622</span><a name="line.622"></a>
<span class="sourceLineNo">623</span>  /**<a name="line.623"></a>
<span class="sourceLineNo">624</span>   * Returns a view of the set as a map, mapping keys from the set according to<a name="line.624"></a>
<span class="sourceLineNo">625</span>   * the specified function.<a name="line.625"></a>
<span class="sourceLineNo">626</span>   *<a name="line.626"></a>
<span class="sourceLineNo">627</span>   * &lt;p&gt;Specifically, for each {@code k} in the backing set, the returned map<a name="line.627"></a>
<span class="sourceLineNo">628</span>   * has an entry mapping {@code k} to {@code function.apply(k)}. The {@code<a name="line.628"></a>
<span class="sourceLineNo">629</span>   * keySet}, {@code values}, and {@code entrySet} views of the returned map<a name="line.629"></a>
<span class="sourceLineNo">630</span>   * iterate in the same order as the backing set.<a name="line.630"></a>
<span class="sourceLineNo">631</span>   *<a name="line.631"></a>
<span class="sourceLineNo">632</span>   * &lt;p&gt;Modifications to the backing set are read through to the returned map.<a name="line.632"></a>
<span class="sourceLineNo">633</span>   * The returned map supports removal operations if the backing set does.<a name="line.633"></a>
<span class="sourceLineNo">634</span>   * Removal operations write through to the backing set.  The returned map<a name="line.634"></a>
<span class="sourceLineNo">635</span>   * does not support put operations.<a name="line.635"></a>
<span class="sourceLineNo">636</span>   *<a name="line.636"></a>
<span class="sourceLineNo">637</span>   * &lt;p&gt;&lt;b&gt;Warning&lt;/b&gt;: If the function rejects {@code null}, caution is<a name="line.637"></a>
<span class="sourceLineNo">638</span>   * required to make sure the set does not contain {@code null}, because the<a name="line.638"></a>
<span class="sourceLineNo">639</span>   * view cannot stop {@code null} from being added to the set.<a name="line.639"></a>
<span class="sourceLineNo">640</span>   *<a name="line.640"></a>
<span class="sourceLineNo">641</span>   * &lt;p&gt;&lt;b&gt;Warning:&lt;/b&gt; This method assumes that for any instance {@code k} of<a name="line.641"></a>
<span class="sourceLineNo">642</span>   * key type {@code K}, {@code k.equals(k2)} implies that {@code k2} is also<a name="line.642"></a>
<span class="sourceLineNo">643</span>   * of type {@code K}. Using a key type for which this may not hold, such as<a name="line.643"></a>
<span class="sourceLineNo">644</span>   * {@code ArrayList}, may risk a {@code ClassCastException} when calling<a name="line.644"></a>
<span class="sourceLineNo">645</span>   * methods on the resulting map view.<a name="line.645"></a>
<span class="sourceLineNo">646</span>   *<a name="line.646"></a>
<span class="sourceLineNo">647</span>   * @since 14.0<a name="line.647"></a>
<span class="sourceLineNo">648</span>   */<a name="line.648"></a>
<span class="sourceLineNo">649</span>  @Beta<a name="line.649"></a>
<span class="sourceLineNo">650</span>  public static &lt;K, V&gt; Map&lt;K, V&gt; asMap(<a name="line.650"></a>
<span class="sourceLineNo">651</span>      Set&lt;K&gt; set, Function&lt;? super K, V&gt; function) {<a name="line.651"></a>
<span class="sourceLineNo">652</span>    if (set instanceof SortedSet) {<a name="line.652"></a>
<span class="sourceLineNo">653</span>      return asMap((SortedSet&lt;K&gt;) set, function);<a name="line.653"></a>
<span class="sourceLineNo">654</span>    } else {<a name="line.654"></a>
<span class="sourceLineNo">655</span>      return new AsMapView&lt;K, V&gt;(set, function);<a name="line.655"></a>
<span class="sourceLineNo">656</span>    }<a name="line.656"></a>
<span class="sourceLineNo">657</span>  }<a name="line.657"></a>
<span class="sourceLineNo">658</span><a name="line.658"></a>
<span class="sourceLineNo">659</span>  /**<a name="line.659"></a>
<span class="sourceLineNo">660</span>   * Returns a view of the sorted set as a map, mapping keys from the set<a name="line.660"></a>
<span class="sourceLineNo">661</span>   * according to the specified function.<a name="line.661"></a>
<span class="sourceLineNo">662</span>   *<a name="line.662"></a>
<span class="sourceLineNo">663</span>   * &lt;p&gt;Specifically, for each {@code k} in the backing set, the returned map<a name="line.663"></a>
<span class="sourceLineNo">664</span>   * has an entry mapping {@code k} to {@code function.apply(k)}. The {@code<a name="line.664"></a>
<span class="sourceLineNo">665</span>   * keySet}, {@code values}, and {@code entrySet} views of the returned map<a name="line.665"></a>
<span class="sourceLineNo">666</span>   * iterate in the same order as the backing set.<a name="line.666"></a>
<span class="sourceLineNo">667</span>   *<a name="line.667"></a>
<span class="sourceLineNo">668</span>   * &lt;p&gt;Modifications to the backing set are read through to the returned map.<a name="line.668"></a>
<span class="sourceLineNo">669</span>   * The returned map supports removal operations if the backing set does.<a name="line.669"></a>
<span class="sourceLineNo">670</span>   * Removal operations write through to the backing set.  The returned map does<a name="line.670"></a>
<span class="sourceLineNo">671</span>   * not support put operations.<a name="line.671"></a>
<span class="sourceLineNo">672</span>   *<a name="line.672"></a>
<span class="sourceLineNo">673</span>   * &lt;p&gt;&lt;b&gt;Warning&lt;/b&gt;: If the function rejects {@code null}, caution is<a name="line.673"></a>
<span class="sourceLineNo">674</span>   * required to make sure the set does not contain {@code null}, because the<a name="line.674"></a>
<span class="sourceLineNo">675</span>   * view cannot stop {@code null} from being added to the set.<a name="line.675"></a>
<span class="sourceLineNo">676</span>   *<a name="line.676"></a>
<span class="sourceLineNo">677</span>   * &lt;p&gt;&lt;b&gt;Warning:&lt;/b&gt; This method assumes that for any instance {@code k} of<a name="line.677"></a>
<span class="sourceLineNo">678</span>   * key type {@code K}, {@code k.equals(k2)} implies that {@code k2} is also of<a name="line.678"></a>
<span class="sourceLineNo">679</span>   * type {@code K}. Using a key type for which this may not hold, such as<a name="line.679"></a>
<span class="sourceLineNo">680</span>   * {@code ArrayList}, may risk a {@code ClassCastException} when calling<a name="line.680"></a>
<span class="sourceLineNo">681</span>   * methods on the resulting map view.<a name="line.681"></a>
<span class="sourceLineNo">682</span>   *<a name="line.682"></a>
<span class="sourceLineNo">683</span>   * @since 14.0<a name="line.683"></a>
<span class="sourceLineNo">684</span>   */<a name="line.684"></a>
<span class="sourceLineNo">685</span>  @Beta<a name="line.685"></a>
<span class="sourceLineNo">686</span>  public static &lt;K, V&gt; SortedMap&lt;K, V&gt; asMap(<a name="line.686"></a>
<span class="sourceLineNo">687</span>      SortedSet&lt;K&gt; set, Function&lt;? super K, V&gt; function) {<a name="line.687"></a>
<span class="sourceLineNo">688</span>    return Platform.mapsAsMapSortedSet(set, function);<a name="line.688"></a>
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<span class="sourceLineNo">690</span><a name="line.690"></a>
<span class="sourceLineNo">691</span>  static &lt;K, V&gt; SortedMap&lt;K, V&gt; asMapSortedIgnoreNavigable(SortedSet&lt;K&gt; set,<a name="line.691"></a>
<span class="sourceLineNo">692</span>      Function&lt;? super K, V&gt; function) {<a name="line.692"></a>
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<span class="sourceLineNo">1501</span>   *<a name="line.1501"></a>
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<span class="sourceLineNo">1522</span>   *   SortedMap&lt;String, Integer&gt; map = ImmutableSortedMap.of("a", 4, "b", 9);<a name="line.1522"></a>
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<span class="sourceLineNo">1541</span>   * The transformed map might contain null values, if the function sometimes<a name="line.1541"></a>
<span class="sourceLineNo">1542</span>   * gives a null result.<a name="line.1542"></a>
<span class="sourceLineNo">1543</span>   *<a name="line.1543"></a>
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<span class="sourceLineNo">1545</span>   * underlying map is.<a name="line.1545"></a>
<span class="sourceLineNo">1546</span>   *<a name="line.1546"></a>
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<span class="sourceLineNo">1552</span>   * a view, copy the returned map into a new map of your choosing.<a name="line.1552"></a>
<span class="sourceLineNo">1553</span>   *<a name="line.1553"></a>
<span class="sourceLineNo">1554</span>   * @since 11.0<a name="line.1554"></a>
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<span class="sourceLineNo">1585</span>   *<a name="line.1585"></a>
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<span class="sourceLineNo">1590</span>   *<a name="line.1590"></a>
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<span class="sourceLineNo">1592</span>   * underlying map is.<a name="line.1592"></a>
<span class="sourceLineNo">1593</span>   *<a name="line.1593"></a>
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<span class="sourceLineNo">1595</span>   * for the returned map to be a view, but it means that the function will be<a name="line.1595"></a>
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<span class="sourceLineNo">1597</span>   * {@code Map.toString()}. For this to perform well, {@code function} should<a name="line.1597"></a>
<span class="sourceLineNo">1598</span>   * be fast. To avoid lazy evaluation when the returned map doesn't need to be<a name="line.1598"></a>
<span class="sourceLineNo">1599</span>   * a view, copy the returned map into a new map of your choosing.<a name="line.1599"></a>
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<span class="sourceLineNo">1604</span>  @GwtIncompatible("NavigableMap")<a name="line.1604"></a>
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<span class="sourceLineNo">2112</span>   *<a name="line.2112"></a>
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<span class="sourceLineNo">2122</span>   *<a name="line.2122"></a>
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<span class="sourceLineNo">2125</span>   *<a name="line.2125"></a>
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<span class="sourceLineNo">2129</span>   * faster to copy the filtered map and use the copy.<a name="line.2129"></a>
<span class="sourceLineNo">2130</span>   *<a name="line.2130"></a>
<span class="sourceLineNo">2131</span>   * &lt;p&gt;&lt;b&gt;Warning:&lt;/b&gt; {@code keyPredicate} must be &lt;i&gt;consistent with<a name="line.2131"></a>
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<span class="sourceLineNo">2155</span>   *<a name="line.2155"></a>
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<span class="sourceLineNo">2161</span>   *<a name="line.2161"></a>
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<span class="sourceLineNo">2165</span>   *<a name="line.2165"></a>
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<span class="sourceLineNo">2167</span>   * unfiltered} is.<a name="line.2167"></a>
<span class="sourceLineNo">2168</span>   *<a name="line.2168"></a>
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<span class="sourceLineNo">2190</span>   * The returned bimap is a live view of {@code unfiltered}; changes to one affect the other.<a name="line.2190"></a>
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<span class="sourceLineNo">2201</span>   *<a name="line.2201"></a>
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<span class="sourceLineNo">2224</span>   *<a name="line.2224"></a>
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<span class="sourceLineNo">2238</span>   *<a name="line.2238"></a>
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<span class="sourceLineNo">2243</span>   *<a name="line.2243"></a>
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<span class="sourceLineNo">2263</span>   *<a name="line.2263"></a>
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<span class="sourceLineNo">2270</span>   *<a name="line.2270"></a>
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<span class="sourceLineNo">2274</span>   *<a name="line.2274"></a>
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<span class="sourceLineNo">2277</span>   *<a name="line.2277"></a>
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<span class="sourceLineNo">2281</span>   * faster to copy the filtered map and use the copy.<a name="line.2281"></a>
<span class="sourceLineNo">2282</span>   *<a name="line.2282"></a>
<span class="sourceLineNo">2283</span>   * &lt;p&gt;&lt;b&gt;Warning:&lt;/b&gt; {@code valuePredicate} must be &lt;i&gt;consistent with<a name="line.2283"></a>
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<span class="sourceLineNo">2286</span>   * inconsistent with equals.<a name="line.2286"></a>
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<span class="sourceLineNo">2288</span>   * @since 11.0<a name="line.2288"></a>
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<span class="sourceLineNo">2298</span>   * other.<a name="line.2298"></a>
<span class="sourceLineNo">2299</span>   *<a name="line.2299"></a>
<span class="sourceLineNo">2300</span>   * &lt;p&gt;The resulting bimap's {@code keySet()}, {@code entrySet()}, and {@code values()} views have<a name="line.2300"></a>
<span class="sourceLineNo">2301</span>   * iterators that don't support {@code remove()}, but all other methods are supported by the<a name="line.2301"></a>
<span class="sourceLineNo">2302</span>   * bimap and its views. When given a value that doesn't satisfy the predicate, the bimap's<a name="line.2302"></a>
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<span class="sourceLineNo">2307</span>   *<a name="line.2307"></a>
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<span class="sourceLineNo">2309</span>   * bimap or its views, only mappings that satisfy the filter will be removed from the underlying<a name="line.2309"></a>
<span class="sourceLineNo">2310</span>   * bimap.<a name="line.2310"></a>
<span class="sourceLineNo">2311</span>   *<a name="line.2311"></a>
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<span class="sourceLineNo">2313</span>   *<a name="line.2313"></a>
<span class="sourceLineNo">2314</span>   * &lt;p&gt;Many of the filtered bimap's methods, such as {@code size()}, iterate across every value in<a name="line.2314"></a>
<span class="sourceLineNo">2315</span>   * the underlying bimap and determine which satisfy the filter. When a live view is &lt;i&gt;not&lt;/i&gt;<a name="line.2315"></a>
<span class="sourceLineNo">2316</span>   * needed, it may be faster to copy the filtered bimap and use the copy.<a name="line.2316"></a>
<span class="sourceLineNo">2317</span>   *<a name="line.2317"></a>
<span class="sourceLineNo">2318</span>   * &lt;p&gt;&lt;b&gt;Warning:&lt;/b&gt; {@code entryPredicate} must be &lt;i&gt;consistent with equals &lt;/i&gt;, as<a name="line.2318"></a>
<span class="sourceLineNo">2319</span>   * documented at {@link Predicate#apply}.<a name="line.2319"></a>
<span class="sourceLineNo">2320</span>   *<a name="line.2320"></a>
<span class="sourceLineNo">2321</span>   * @since 14.0<a name="line.2321"></a>
<span class="sourceLineNo">2322</span>   */<a name="line.2322"></a>
<span class="sourceLineNo">2323</span>  @Beta<a name="line.2323"></a>
<span class="sourceLineNo">2324</span>  public static &lt;K, V&gt; BiMap&lt;K, V&gt; filterValues(<a name="line.2324"></a>
<span class="sourceLineNo">2325</span>      BiMap&lt;K, V&gt; unfiltered, final Predicate&lt;? super V&gt; valuePredicate) {<a name="line.2325"></a>
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<span class="sourceLineNo">2331</span>   * predicate. The returned map is a live view of {@code unfiltered}; changes<a name="line.2331"></a>
<span class="sourceLineNo">2332</span>   * to one affect the other.<a name="line.2332"></a>
<span class="sourceLineNo">2333</span>   *<a name="line.2333"></a>
<span class="sourceLineNo">2334</span>   * &lt;p&gt;The resulting map's {@code keySet()}, {@code entrySet()}, and {@code<a name="line.2334"></a>
<span class="sourceLineNo">2335</span>   * values()} views have iterators that don't support {@code remove()}, but all<a name="line.2335"></a>
<span class="sourceLineNo">2336</span>   * other methods are supported by the map and its views. When given a<a name="line.2336"></a>
<span class="sourceLineNo">2337</span>   * key/value pair that doesn't satisfy the predicate, the map's {@code put()}<a name="line.2337"></a>
<span class="sourceLineNo">2338</span>   * and {@code putAll()} methods throw an {@link IllegalArgumentException}.<a name="line.2338"></a>
<span class="sourceLineNo">2339</span>   * Similarly, the map's entries have a {@link Entry#setValue} method that<a name="line.2339"></a>
<span class="sourceLineNo">2340</span>   * throws an {@link IllegalArgumentException} when the existing key and the<a name="line.2340"></a>
<span class="sourceLineNo">2341</span>   * provided value don't satisfy the predicate.<a name="line.2341"></a>
<span class="sourceLineNo">2342</span>   *<a name="line.2342"></a>
<span class="sourceLineNo">2343</span>   * &lt;p&gt;When methods such as {@code removeAll()} and {@code clear()} are called<a name="line.2343"></a>
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<span class="sourceLineNo">2345</span>   * will be removed from the underlying map.<a name="line.2345"></a>
<span class="sourceLineNo">2346</span>   *<a name="line.2346"></a>
<span class="sourceLineNo">2347</span>   * &lt;p&gt;The returned map isn't threadsafe or serializable, even if {@code<a name="line.2347"></a>
<span class="sourceLineNo">2348</span>   * unfiltered} is.<a name="line.2348"></a>
<span class="sourceLineNo">2349</span>   *<a name="line.2349"></a>
<span class="sourceLineNo">2350</span>   * &lt;p&gt;Many of the filtered map's methods, such as {@code size()},<a name="line.2350"></a>
<span class="sourceLineNo">2351</span>   * iterate across every key/value mapping in the underlying map and determine<a name="line.2351"></a>
<span class="sourceLineNo">2352</span>   * which satisfy the filter. When a live view is &lt;i&gt;not&lt;/i&gt; needed, it may be<a name="line.2352"></a>
<span class="sourceLineNo">2353</span>   * faster to copy the filtered map and use the copy.<a name="line.2353"></a>
<span class="sourceLineNo">2354</span>   *<a name="line.2354"></a>
<span class="sourceLineNo">2355</span>   * &lt;p&gt;&lt;b&gt;Warning:&lt;/b&gt; {@code entryPredicate} must be &lt;i&gt;consistent with<a name="line.2355"></a>
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<span class="sourceLineNo">2359</span>      Map&lt;K, V&gt; unfiltered, Predicate&lt;? super Entry&lt;K, V&gt;&gt; entryPredicate) {<a name="line.2359"></a>
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<span class="sourceLineNo">2372</span>   * Returns a sorted map containing the mappings in {@code unfiltered} that<a name="line.2372"></a>
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<span class="sourceLineNo">2374</span>   * changes to one affect the other.<a name="line.2374"></a>
<span class="sourceLineNo">2375</span>   *<a name="line.2375"></a>
<span class="sourceLineNo">2376</span>   * &lt;p&gt;The resulting map's {@code keySet()}, {@code entrySet()}, and {@code<a name="line.2376"></a>
<span class="sourceLineNo">2377</span>   * values()} views have iterators that don't support {@code remove()}, but all<a name="line.2377"></a>
<span class="sourceLineNo">2378</span>   * other methods are supported by the map and its views. When given a<a name="line.2378"></a>
<span class="sourceLineNo">2379</span>   * key/value pair that doesn't satisfy the predicate, the map's {@code put()}<a name="line.2379"></a>
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<span class="sourceLineNo">2381</span>   * Similarly, the map's entries have a {@link Entry#setValue} method that<a name="line.2381"></a>
<span class="sourceLineNo">2382</span>   * throws an {@link IllegalArgumentException} when the existing key and the<a name="line.2382"></a>
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<span class="sourceLineNo">2384</span>   *<a name="line.2384"></a>
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<span class="sourceLineNo">2388</span>   *<a name="line.2388"></a>
<span class="sourceLineNo">2389</span>   * &lt;p&gt;The returned map isn't threadsafe or serializable, even if {@code<a name="line.2389"></a>
<span class="sourceLineNo">2390</span>   * unfiltered} is.<a name="line.2390"></a>
<span class="sourceLineNo">2391</span>   *<a name="line.2391"></a>
<span class="sourceLineNo">2392</span>   * &lt;p&gt;Many of the filtered map's methods, such as {@code size()},<a name="line.2392"></a>
<span class="sourceLineNo">2393</span>   * iterate across every key/value mapping in the underlying map and determine<a name="line.2393"></a>
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<span class="sourceLineNo">2395</span>   * faster to copy the filtered map and use the copy.<a name="line.2395"></a>
<span class="sourceLineNo">2396</span>   *<a name="line.2396"></a>
<span class="sourceLineNo">2397</span>   * &lt;p&gt;&lt;b&gt;Warning:&lt;/b&gt; {@code entryPredicate} must be &lt;i&gt;consistent with<a name="line.2397"></a>
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<span class="sourceLineNo">2399</span>   *<a name="line.2399"></a>
<span class="sourceLineNo">2400</span>   * @since 11.0<a name="line.2400"></a>
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<span class="sourceLineNo">2402</span>  public static &lt;K, V&gt; SortedMap&lt;K, V&gt; filterEntries(<a name="line.2402"></a>
<span class="sourceLineNo">2403</span>      SortedMap&lt;K, V&gt; unfiltered,<a name="line.2403"></a>
<span class="sourceLineNo">2404</span>      Predicate&lt;? super Entry&lt;K, V&gt;&gt; entryPredicate) {<a name="line.2404"></a>
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<span class="sourceLineNo">2411</span>  /**<a name="line.2411"></a>
<span class="sourceLineNo">2412</span>   * Returns a bimap containing the mappings in {@code unfiltered} that satisfy a predicate. The<a name="line.2412"></a>
<span class="sourceLineNo">2413</span>   * returned bimap is a live view of {@code unfiltered}; changes to one affect the other.<a name="line.2413"></a>
<span class="sourceLineNo">2414</span>   *<a name="line.2414"></a>
<span class="sourceLineNo">2415</span>   * &lt;p&gt;The resulting bimap's {@code keySet()}, {@code entrySet()}, and {@code values()} views have<a name="line.2415"></a>
<span class="sourceLineNo">2416</span>   * iterators that don't support {@code remove()}, but all other methods are supported by the bimap<a name="line.2416"></a>
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<span class="sourceLineNo">2418</span>   * {@code put()}, {@code forcePut()} and {@code putAll()} methods throw an<a name="line.2418"></a>
<span class="sourceLineNo">2419</span>   * {@link IllegalArgumentException}. Similarly, the map's entries have an {@link Entry#setValue}<a name="line.2419"></a>
<span class="sourceLineNo">2420</span>   * method that throws an {@link IllegalArgumentException} when the existing key and the provided<a name="line.2420"></a>
<span class="sourceLineNo">2421</span>   * value don't satisfy the predicate.<a name="line.2421"></a>
<span class="sourceLineNo">2422</span>   *<a name="line.2422"></a>
<span class="sourceLineNo">2423</span>   * &lt;p&gt;When methods such as {@code removeAll()} and {@code clear()} are called on the filtered<a name="line.2423"></a>
<span class="sourceLineNo">2424</span>   * bimap or its views, only mappings that satisfy the filter will be removed from the underlying<a name="line.2424"></a>
<span class="sourceLineNo">2425</span>   * bimap.<a name="line.2425"></a>
<span class="sourceLineNo">2426</span>   *<a name="line.2426"></a>
<span class="sourceLineNo">2427</span>   * &lt;p&gt;The returned bimap isn't threadsafe or serializable, even if {@code unfiltered} is.<a name="line.2427"></a>
<span class="sourceLineNo">2428</span>   *<a name="line.2428"></a>
<span class="sourceLineNo">2429</span>   * &lt;p&gt;Many of the filtered bimap's methods, such as {@code size()}, iterate across every<a name="line.2429"></a>
<span class="sourceLineNo">2430</span>   * key/value mapping in the underlying bimap and determine which satisfy the filter. When a live<a name="line.2430"></a>
<span class="sourceLineNo">2431</span>   * view is &lt;i&gt;not&lt;/i&gt; needed, it may be faster to copy the filtered bimap and use the copy.<a name="line.2431"></a>
<span class="sourceLineNo">2432</span>   *<a name="line.2432"></a>
<span class="sourceLineNo">2433</span>   * &lt;p&gt;&lt;b&gt;Warning:&lt;/b&gt; {@code entryPredicate} must be &lt;i&gt;consistent with equals &lt;/i&gt;, as<a name="line.2433"></a>
<span class="sourceLineNo">2434</span>   * documented at {@link Predicate#apply}.<a name="line.2434"></a>
<span class="sourceLineNo">2435</span>   *<a name="line.2435"></a>
<span class="sourceLineNo">2436</span>   * @since 14.0<a name="line.2436"></a>
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<span class="sourceLineNo">2439</span>  public static &lt;K, V&gt; BiMap&lt;K, V&gt; filterEntries(<a name="line.2439"></a>
<span class="sourceLineNo">2440</span>      BiMap&lt;K, V&gt; unfiltered, Predicate&lt;? super Entry&lt;K, V&gt;&gt; entryPredicate) {<a name="line.2440"></a>
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<span class="sourceLineNo">2444</span>        ? filterFiltered((FilteredEntryBiMap&lt;K, V&gt;) unfiltered, entryPredicate)<a name="line.2444"></a>
<span class="sourceLineNo">2445</span>        : new FilteredEntryBiMap&lt;K, V&gt;(unfiltered, entryPredicate);<a name="line.2445"></a>
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<span class="sourceLineNo">2448</span>  /**<a name="line.2448"></a>
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<span class="sourceLineNo">2450</span>   * filtering a filtered map.<a name="line.2450"></a>
<span class="sourceLineNo">2451</span>   */<a name="line.2451"></a>
<span class="sourceLineNo">2452</span>  private static &lt;K, V&gt; Map&lt;K, V&gt; filterFiltered(AbstractFilteredMap&lt;K, V&gt; map,<a name="line.2452"></a>
<span class="sourceLineNo">2453</span>      Predicate&lt;? super Entry&lt;K, V&gt;&gt; entryPredicate) {<a name="line.2453"></a>
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<span class="sourceLineNo">2458</span><a name="line.2458"></a>
<span class="sourceLineNo">2459</span>  private abstract static class AbstractFilteredMap&lt;K, V&gt;<a name="line.2459"></a>
<span class="sourceLineNo">2460</span>      extends AbstractMap&lt;K, V&gt; {<a name="line.2460"></a>
<span class="sourceLineNo">2461</span>    final Map&lt;K, V&gt; unfiltered;<a name="line.2461"></a>
<span class="sourceLineNo">2462</span>    final Predicate&lt;? super Entry&lt;K, V&gt;&gt; predicate;<a name="line.2462"></a>
<span class="sourceLineNo">2463</span><a name="line.2463"></a>
<span class="sourceLineNo">2464</span>    AbstractFilteredMap(<a name="line.2464"></a>
<span class="sourceLineNo">2465</span>        Map&lt;K, V&gt; unfiltered, Predicate&lt;? super Entry&lt;K, V&gt;&gt; predicate) {<a name="line.2465"></a>
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<span class="sourceLineNo">2467</span>      this.predicate = predicate;<a name="line.2467"></a>
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<span class="sourceLineNo">2469</span><a name="line.2469"></a>
<span class="sourceLineNo">2470</span>    boolean apply(Object key, V value) {<a name="line.2470"></a>
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<span class="sourceLineNo">2472</span>      // key is a K.<a name="line.2472"></a>
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<span class="sourceLineNo">2696</span>    @Override<a name="line.2696"></a>
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<span class="sourceLineNo">2702</span>    @Override<a name="line.2702"></a>
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